Jun 16 2014 i work in stages when sanding body filler: 40-grit then 80-grit and finishing with 120-grit sandpaper before primer when all of the bodywork is done i apply three coats polyester primer.
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The best advice that i can give you when sanding body filler is to cross sand when block sanding and do not over sand the fillerThose are the most two common mistakes i seeCross sanding will help level the body fillerOver sanding will cause the edges to be undercut which will show up through the paint after.
Automotive filler is often misunderstoodThey get a bad rap because of overuse improper mixing and applying and they didn't use to be that goodBut the modern stuff used right is greatOk so you have the metal you want to work on down to bare metal and sanded with 80 grit.
Dec 19 2010 here are some tools for sanding fillerI rake out the joint with a knife to create a vI then force the filler in the crack working across the crack left then rightRun a layer of filler along the length of the crack and leave to dry hardWhen it has dried overfill the crack making sure the filler is slightly proud.
Do not worry if runs form focus on creating a solid base coat to blend in body filler and remove dents and wavesTo start wrap the 17 wooden sanding board with 150 grit sandpaperSand the body in an elongated x-pattern as shown in the second photoThis allows you to follow the contours of the body.
Filler 80 grit medium: level and shapes: use first on small repair areas to level and shape fillerOr use to minimize 36 grit scratches on large repair areas150 - 220 grit mediumfine: smooths: used to smooth and minimizes 80 grit scratches before applying primer.
Jun 16 2014 i work in stages when sanding body filler: 40-grit then 80-grit and finishing with 120-grit sandpaper before primerWhen all of the bodywork is done i apply three coats polyester primer.
Mar 08 2018 although sanding blocks are available commercially in various shapes and sizes you will often need to improvise to access the particular area that you are sandingTo finish a normal-sized sanding block can then be used to touch up the edges of areas where you applied the auto body fillerRemember you can never sand too much.
Mar 27 2015 the sanding block gets its name because once upon a time it was just a block of wood with sandpaper stuck to itThe hard flat block allowed you to sand to a much more uniform surfaceLater the heavy rubber style alligator or vampire sanding blocks were invented with teeth in them to grip a 14 strip of sand paper but that.
No matter what product you are sanding whether it be paint body filler or fiberglass if the sandpaper starts to clog covering the surface in just a minute or so you should try going to the next aggressive sandpaperToday i was sanding some fiberglass filler which is like standard bondo filler but has a fiberglass fiber and gel in it.
Sand the metal and hardened filler with a sanding block and 80-grit sandpaper if necessary and wipe off the dust with a dry ragAuto-body filler and metal conditioner should not contact.
Sanding especially hand sanding is a painAnything that can help make the job easier and go faster is welcome such as a well made sanding blockUnfortunately finding a good practical sanding block appears to be next to impossibleAt least i haven’t had much luck.
Start with 36 3m 02232 or 40 grit on your block and position yourself so you can sand the length of the filler with some pressure on the blockI start sanding in the center of the filler using a back and forth x motion narrowing the sides of the x.
These sandpapers are used for the main body work process when cutting body filler bondo shaping feathering and final sanding when prepping for paintFiner grits like 1200 1500 2000 and 3000 is used for finishingA term that is called color sanding and buffing or cut and buff.
This is a quick video to let you know about some new sanding blocks i discoveredBlocking may not be your favorite thing to do but if you're doing this type of work then you'll be doing a lot of itSo you will need the best sanding block available to help make the job go faster and easier.
Use 320 grit to complete feathering edge of any compounds and as a block sand before application of any primersYou may also use a 400 grit which is a bit less coarse.
When block sanding polyester primer how do you know when to stop sanding? the point of polyester primer is to help straighten the body work fill minor imperfections and have a harder and more uniform surfaceWhile polyester does help straighten body work it should not at all be used as a crutch; do your absolute best work possible in the body work process and prime over 150 grit.
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